Tool holder



O. N. RIKOF May so, 1939.

a key way adjoining the slot and a clamp screw fitted in the shank so asto bear against said clamping member for holding the elements inposition.

2. A tool holder comprising in combination, a shank having an obliquecylindrical longitudinal tool slot, a semicircular paoking pieceswivelly arranged in the front part of said slot and provided With agroove in its plane side to accommodate an angular cutter, the lowermostbearing surface of said cutter having an eased off portlon, a segmentalpacking piece fitted in the shank in a key way adjoining the slot and aclamp screw fitted in the shank so as to bear against said segmentalpiece f'or holding the elements in position.

3. A tool holder comprising in combination, a shank having an obliquecylindrical longitudinal tool slot, a semi-circular packing pieceswivelly arranged in the front part of said slot and provided with agroove in its plane side to accommodate a triangular cutter, thelowermost bearing surface of said cutter having an eased ofi portion, asegmental packing piece fitted in the shank in a key way adjoining theslot and a olamp screw fitted in the shank so as 110 bear against saidsegmental piece for holding the eler'nents in position.

4. A tool holder comprising in combination, a shank having an obliquecylindrical longitudinal tool slot, a semi-circular packing pieceswivelly arranged in the front part of said slot and provided with agroove in its plane side to aocommodate a cutter of equilateraltriangular section,

the lowermost bearing surface of said cutter having an eased ofi'portion, a segmental packing piece fitted in the shank in a key wayadjoining the slot and a clamp screw fitted in the shank so as 110 bearagainst said segmental piece for holding the elements in position.

5. A tool holder comprising in combination, a. shank having an obliquecylindrical longitudinal tool slot, a semi-circular packing pieceswivelly arranged in the front part of said slot and provided with agroove in its plane side to accommodate an angular cutter, the lowermostbearing surface of said cutter having an eased oft portion a taperedclamp bar fitted in the shank in a key way adjoining the slot, saidclamp bar being reversible for incllning the tool in elther directionand exchangeable for varying the angle of inclination, and a clamp screwfitted in the shank so as to bear against said clamp bar for holding theelements in position.

6. A tool holder oomprising in combination, a shank having an obliqueoylindrical longitudinal tool slot, a semi-ciroular packlng pieceswivelly arranged in the front part of said slot and provided with agroove in its plane side to accommodate a cutter of equilateraltriangular section, the lowermost bearing surface of said outter havingan eased off portion, a tapered clamp bar fitted in the shank in a keyway adjoining the s1ot, said clamp bar being reversible for incliningthe tool in either direction and exchangeable for varyirlg the angle ofinclination, and a clamp screw fitted in the sl1ank so as to bearagainst said clamp bar for holding the elements in position.

OLOF NILSSON RIKOF.

